Cool start for your sketchbook man see your having alot of fun. Snafu haha that name sounds familiar to me there used to be an old bike company with that name.
keep the studies up ill be looking out for those updates
-Jamie

@Nicky - thank you, I will =)
@sabuesa - thank you, I drew that when I visited the Rodin Museum in Paris =)
@Sevans _ Thank you, i will try and sharpen and tighten my future works =)
@larchist - Thank you for the comment =). Experimentation is one of my favourite parts of art

Here's some more stuff, done the life study from a reference but never finished it, got bored and didn't really like how it was goin..

it'd be nice to have some tips in drawing clothes and cityscapes; i probably find them hardest, yet they're my favourite part of concept art (cities that is... not so much clothes , though complex suits are always cool). I'm not great with vehicles/robots either, so tips there would be great too

the drawing of another person is a drawin of my dad... while he was on the sofa =)

the enviro is just a wip base for a monster or something which i'll draw later

Amazing start to a sketchbook - so nice to look at all the skill and variety! Especially love the female torso in monochrome.
I also find cityscapes and clothes hard to get a grip on, so much structure in one and texture in another, really hard to learn. I guess the trick is to do life drawing and try to copy what you see as close as you can.. until you can! Then you'll have a 'bank' of textures, etc to use and improve without having the stuff in front of you.

You have a really great way with economy and implied detail! Some of these remind me of some of the posts that Mikko Kinunnen made a good while back about how far he could go with implying detail before the painting became unrecognizable. Cool stuff!